This is an easy one.Susanna is the dau. of John and Christine per his will which names her and her husband.
WILL: John Groscost of Berwick Twp. Adams Co, PA will dated Sep. 23 1801 prob. Oct. 27, 1801 wife Christina Groscost children named John, Jacob, Elizabeth, Susanna and her husband Joseph Little, Christina and her husband John Knight, Daniel, and Mary.
Christina is dau. of Philip Noll whose will names her. Phil Noll's dau. of Christina m. John Groscost per Wills F p. 324 (note at the York Co Historical Society)
WILL: Philip Noll of Berwick Twp dated April 26 1771 wife Elizabeth sons Johan Jost and George Noll who are exec. mentions other children dau. Susannah Elinor, Mary Elizabeth, and Christina.
I hope this helps with a primary record of their connection.
Christos Christou, Jr. 303 Nicholson Road Essex, MD 21221-6609 firstname.lastname@example.org